Stack-head for hot-air stacks or conduits.



A. G. SCHERER.

STACK HEAD FOR HOT AIR STACKS 0R CONDUITS.

APPLICATION FILED JUNE 8. 1914.

1 ,141,492. Patented June 1, 1915.

4 2 SHEETS-SHEET I. 4

A. G. SCHERER.

STACK HEAD FOR HOT AIR STACKS 0R CONDUITS.

APPLICATION FILED JUNE 8. I914.

Patented June 1, 1915.

2 SHEETSSHEET 2.

ITED STATES PATENT OFFICE.

ALBERT G. SCHERER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE EXCELSIOR STEEL FURNACE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

STACK-HEAD FOR, HOT-AIR STACKS OR CONDUITS.

Specification of Letters Patent.

Patented June 1, 1915.

Application filed June 8, 1914. Serial No. 843,671.

T all whom it may concern Be it known that I, ALBERT G. SCHERER, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented a new and use ful Stack-Head for Hot-Air Stacks or Conduit-s, of which the following is a specification.

In the installation of the conduits for the distribution of hot air in connection with a hot air heating system, the vertically disposed conduit are usually known as stack. It is the general practice to employ conduit of rectangular section so as to be able to install the same between the studding of the walls. The conduit may be either single or double walled. It is desirable, and is the practice, to provide the vertical stack with register openings and for this purpose specially formed sections of stack are provided and these sections are known as stack heads. A stack head may terminate the upper end of a stack, or, as is very often the case, the stack may be carried above the first head to one or more upper stories. It will also be seen that when a stack is carried above a register opening the conduit may economically be reduced in section as the upper portion of the stack does not have to supply the lower register.

It has heretofore, so far as I am aware, been necessary to manufacture and carry in stock a considerable number of different stack heads to meet the exigencies of different installations.

It is the object of my present invention to design a single stack head which will serve either as a final termination of a stack, or will permit of the assembly therewith of the same size or a choice of several smaller size conduits so as to extend the stack to an up per story.

I attain the above objects by means of the structure illustrated in the accompanying drawing, in which Figure 1 is a perspective of a stack head built in accordance with my invention, the same being shown with a closure covering the upper opening; Fig. 2 is a perspective detail of one corner of the structure shown in Fig. 1 with a section of smaller sized conduit in assembly therewith; Fig. 3 is a vertical transverse sectional detail of the top of the stack head with a section of conduit 1n assembly therewith; Fig. 4 is a longitudinal vertical sectional detail of the structure shown in Figs. 2 and 3; Fig. 5 is a modified construction of tongue for closing the openings between the end walls of sections of different width.

Similar reference characters refer to similar parts throughout the several views.

I have shown my invention embodied in a double wall stack head. The stack head comprises front, inner and outer walls 1, and l, inner and outer side walls 2, 2, and 2, 2, and inner and outer rear walls 3, 3. What may be regarded as the upper forward port-ions 4, 4, of the side walls are sloped or tapered rearwardly, the top of the front Walls terminating where the taper commences to form an opening in the stack with rearwardly inclined vertical .edges for mounting a register.

The inner and outer walls are spaced apart to permit of the circulation of air between the respective walls and the forward edges of the tapered portion of the inner and outer side walls are brought together by bending about a half inch or thereabout of the outer wall inwardly upon a bevel until it meets the inner wall and then turning the edge of the inner wall outwardly and seaming it down over the edge of the outer wall.

The top of the register opening is formed as just described of inner and outer walls, 5 and 5, which run rearwardly until the end of the, taper of the side walls, and then upwardly to form, in connection with the inner and outer side and rear walls, a means for connecting a closure or another section of stack as may be desired.

The means supplied for securing a closure or another section of stack consists in bending the outer front side and rear walls inwardly to form a shoulder 6, to receive and support the outer wall of an adjoining section. The outer wall is carried upwardly from the shoulder 6, for a short distance and is then turned inwardly and downwardly (as at 7 in Fig. 4) until the inner wall is reached. The outer wall is then carried upwardly against the inner wall to near the upper edge thereof where a ridge, 8,

of angular section is formed and the wall is then carried up and over the inner wall. The ridge 8 is for the purpose of locking the closure or an additional section in position.

In Fig. 1 I have shown the top of the stack provided with a closure, 9, as will be necessary when the stack is not to be carried above the stack head.

In order to make it possible to assemble stack sections of different dimensions with the opening in the top of the stack head, I provide a series of opposite transverse slits 10, in the front and rear walls about the opening in the top or" the stack head which extend approximately to the shoulder 6, so that the end walls of stack of less width may enter the slits 10, an area of the inner walls of the stack of less width being cut away at their respective corners so that the side walls of such assembling sections will assemble and lock with the front and rear walls of the stack head in the usual manner. Such an assembly of the stack head with a section of stack of less width, as above described, would leave an opening between the inner side walls of the stack head and the side walls of the section of narrower stack, and to close these openings, I secure by their lower edges to the inner faces of the innerv side walls the tongues 11, which may be flexed outwardly to extend within and come adjacent the inner end walls of the adjoining section, as shown in Figs. 3 and 4. The tongues 11 may be soldered or secured in any convenient manner to the inner side walls of the stack head, or, as is shown in Fig. 5, a pocket 12 may be formed in the inner side walls into which can be inserted a properly shaped pieceof sheet metal 13, which may be readily cut to suit conditions on the job.

Having described my invention what I claim as new and desireto. secure by Letters Patent, is

1. A stack head for hot air stack compris ing a. casing" of substantially rectangular cross section formed with a re ister-opening and a plurality of openings or connection with sections of stack, the rim of one of. said openings being formed toenter an. adjacent section of stack, said rim; being provided with oppositely disposed slots for the reception of the walls of a section of lesser breadth, and: tongues secured to the inner surface of said stack head adjacent said last mentioned opening and adapted to be flexed to enter a section of less breadth.

2. A stack head for hot air stack comprising a casing of substantially rectangular cross section. formed: with a register opening and a plurality of opening for connec tion with sections of stack, the rim of one of said openings being formed to enter and lock with an adjacent section of stack, said rim being provided with oppositely disposed slots for the reception of the walls of a section of lesser breadth, and tongues secured to the inner surface of said stack head adjacent said last mentioned opening and adapted to be flexed to enter a section of less breadth.

3. A stack head for hot air stack comprising a double wall casing of substantially rectangular cross section formed with a register opening and a plurality of openings for connection with sections of stack, the rim of one of said openings being formed to enter an adjacent section of stack, said rim being provided with oppositely disposed slots for the reception of the walls of a section of lesser breadth, and tongues secured to the inner surface of said stack head adj acent said last mentioned opening and adapted to be flexed to enter a section of less breadth.

4. A stack head for hot air stack comprising a double wall casing of substantially rectangular cross section formed with a register opening and a plurality of openings for connection with sections of stack, the rim of one of said openings being formed to enter and lock with an adjacent section of stack, said rim being provided with oppositely disposed slots for the reception of the wall of a section of lesser breadth, and tongues secured to the inner surface of said stack head adjacent said last mentioned opening and adapted to be flexed to enter a section of less breadth.

5. A stack comprising a section of easing of substantially rectangular cross section formed with a plurality of openings for connection with other sections of stack, the rim of one of said openings being formed to enter an adjacent section. of stack, said rim being provided -with oppositely disposed slots for the reception of the walls of a section 0t lesser breadth, and tongues secured to the inner surface of said section of stack adjacent said last mentioned opening and adapted to be flexed. to enter a section of less breadth.

In testimony whereof I afiix my signature. in the presence of two witnesses.

ALBERT G. SCHERER.

Witnesses J. H. JOCHUM, Jr., M. A. MILORD.

copies of this patent'may lie, fl ltainedafor fiveqents each, by addressing the "Gommissioner of Patents Was ing n, D- 0-. 

